Discussion
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- Question
The abrasive recommended for grinding materials of low tensile strength is
Options- A. silicon carbide
- B. aluminium oxide
- C. sand stone
- D. diamond
- Correct Answer
- silicon carbide
- 1. The carbide tools operating at very low cutting speeds (below 30 m/min)
Options- A. reduces tool life
- B. increases tool life
- C. have no effect on tool life
- D. spoils the work piece Discuss
- 2. Flank wear depends upon the
Options- A. hardness of the work and tool material at the operating temperature
- B. amount and distribution of hard constituents in the work material
- C. degree of strain hardening in the chip
- D. all of these Discuss
- 3. Crater wear is mainly due to the phenomenon known as
Options- A. adhesion of metals
- B. oxidation of metals
- C. diffusion of metals
- D. all of these Discuss
- 4. The lip angle is the angle
Options- A. between the tool face and the ground end surface of flank
- B. made by the face of the tool and the plane parallel to the base of the cutting tool
- C. between the face of the tool and a line tangent to the machined surface at the cutting point
- D. none of the above Discuss
- 5. Fixtures are used
Options- A. for holding and guiding the tool in drilling, reaming or tapping operations
- B. for holding the work in milling, grinding, planing or turning operations
- C. to check the accuracy of workpiece
- D. none of the above Discuss
- 6. The addition of lead, sulphur and phosphorus to low carbon steels, help to
Options- A. reduce built up edge
- B. break up chips
- C. improve machinability
- D. all of these Discuss
- 7. The cutting fluid mostly used for machining steel is
Options- A. water
- B. soluble oil
- C. dry
- D. heavy oils Discuss
- 8. With the same tool life, the maximum material per minute is removed by
Options- A. increasing the cutting speed
- B. decreasing the cutting speed
- C. increasing the depth of cut
- D. increasing the feed rate Discuss
- 9. In which of the following machine, the work is usually rotated while the drill is fed into work?
Options- A. Sensitive drilling machine
- B. Radial drilling machine
- C. Gang drilling machine
- D. Deep hole drilling machine Discuss
- 10. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)
Options- A. VnT = C
- B. VTn = C
- C. Vn/T = C
- D. V/Tn = C Discuss
Production Engineering problems
Search Results
Correct Answer: reduces tool life
Correct Answer: amount and distribution of hard constituents in the work material
Correct Answer: diffusion of metals
Correct Answer: between the tool face and the ground end surface of flank
Correct Answer: for holding the work in milling, grinding, planing or turning operations
Correct Answer: all of these
Correct Answer: soluble oil
Correct Answer: increasing the depth of cut
Correct Answer: Deep hole drilling machine
Correct Answer: VTn = C
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